Titre original : The Great Candid Idol Operation
Akari and Hinaki participate in a hidden camera show in which they must try and spring a surprise on Sumire. After their initial pranks fail to provoke any kind of reaction from Sumire, the girls try using raw fish to spook her, only to discover that she had learned how to manage them. Just as the girls prepare their final trick, a booby-trapped bench, a sheep breaks loose from a petting zoo, prompting Sumire to stop it before it hurts itself. After explaining everything to Sumire, Akari inadvertedly lands on the booby trapped bench herself, which turns out to be what provokes a reaction from Sumire, who was worried about Akari's safety. Afterwards, Sumire receives a new dress and a bracelet from Maya as a final surprise.